According to Hindu beliefs, one's position in the caste system is determined by

A)
your chosen profession.

B)
your deeds in a previous life.

C)
a test you take when you are 15.

D)
the caste system of your husband or wife.

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."

i believe your answer is mountains.

i think it should be c